Titre : |
Natural weathering of spruce wood chemically modified by re-used e-caprolactone solution |
Type de document : |
texte imprimé |
Auteurs : |
Merve Cambazoglu, Auteur ; Eylem Dizman Tomak, Auteur ; Mahmut A. Ermeydan, Auteur |
Année de publication : |
2023 |
Article en page(s) : |
p. 265-275 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Analyse morphologique Bois -- Conservation Colorimétrie Epicéas et constituants Hydrophobie Poly-e-caprolactone Rugosité
|
Index. décimale : |
674.1 Texture, propriétés, types de bois de |
Résumé : |
Increasing environmental pressures over the last few years have led to attention for non-biocide treatments in the wood protection field. The ε-caprolactone modification of wood by substitution or blocking of hydroxyl groups with hydrophobic poly(ε-caprolactone) (PCL) is one of the novel modification methods developed in recent years. In this study, ring-opening polymerisation of ε-caprolactone in wood cell walls was evaluated by the third and sixth re-use of recovered monomer and by oven-curing method. Spruce samples were modified by re-used ε-caprolactone and exposed to the natural weathering agents for 12 months. After weathering, the colour change, surface roughness measurements, and macroscopic and ultra-microscopic observations revealed that the modified wood had better surface properties than reference wood. Fourier-transform infrared (FTIR) analysis proved that PCL could be found on the weathered surface up to the sixth month, but very little amount was detected on the surfaces with a longer weathering period. The results clearly showed that the efficiency of PCL modification with re-use of the monomer solution was sufficient during the initial weathering periods, but efficiency was reduced after a prolonged exposure period. |
Note de contenu : |
- MATERIALS AND METHODS : Materials - Poly(ε-caprolactone) (PCL) modification - Natural weathering - Colour and surface roughness measurement - Fourier-transform infrared (FTIR) analysis - Morphological analysis by scanning electron microscopy (SEM)
- RESULTS AND DISCUSSION : Weight percentage gain (WPG) and volume change (VC) of the samples - Colour changes after the natural weathering test - Surface chemistry analysis after the natural weathering test - Surface roughness changes after the natural weathering test
- Table 1 : Weight percentage gain (WPG) and volume change (VC) of samples after the modification process
- Table 2 : Intensity ratio of cellulose (899 cm−1) and lignin (1508 cm−1) related bands during weathering |
DOI : |
https://doi.org/10.1111/cote.12645 |
En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12645 |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39537 |
in COLORATION TECHNOLOGY > Vol. 139, N° 3 (06/2023) . - p. 265-275